PuTTY bug kbdint-failure

summary: Keyboard-interactive authentication only permits one tryclass: bug: This is clearly an actual problem we want fixed.difficulty: fun: Just needs tuits, and not many of them.priority: high: This should be fixed in the next release.present-in: 0.56fixed-in: 2005-01-08 550f7b37cb7dbe0dcd68d2ac2c3b529e643599b3 (0.58)

It's been observed that SSH-2 "keyboard-interactive" authentication in
PuTTY only permits one attempt at authentication before falling back
to other forms of authentication, such as password-based. If no other
methods are supported by the server, PuTTY will bomb out with the
message "No supported authentication methods left to try!".

This has been exacerbated recently as several distributions are
configuring OpenSSH to use k-i for even basic password authentication
these days, and not enabling PasswordAuthentication at all by default.

As of 2005-01-08, PuTTY will continue to attempt keyboard-interactive
authentication as long as the server continues to offer it, in
preference to password authentication, unless the server refuses it
outright. (If you need to get past k-i, you can disable attempts to
use keyboard-interactive entirely on the "Auth" panel.)